The Enforcement Directorate is examining the reply sent by Delhi Chief Minister Arvind Kejriwal regarding his refusal to appear before the agency and may issue its fourth summons to him to join the investigation in the alleged excise policy case, official sources said Thursday.

The 55-year-old Aam Aadmi Party (AAP) national convenor had refused to depose before the ED for the third time on Wednesday, saying the "non-disclosure and non-response approach" of the agency cannot sustain the test of law, equity or justice and this "obstinacy" of the ED tantamounts to assuming the role of judge, jury and executioner.